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(No Model.) 6

J. H. BROWN. 6 6 METHOD OF ANGHORING THE ENDS 0F WIRE No. 496,636. Patented May 2; 1893.

I UNITED STATES,

PATENT OFFICE.

JOHN H. BROWN, on NEW YORK, N.

METHOD OF ANCHORING THE ENDS OF WIRE.

SPECIFICATION forming part of Letters Patent No. 496,636, dated May 2, 1893.

Applicationfiled July 7, 1891- Serial No. 398,679. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN H. BROWN, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Anchoring the Ends of Wire, of which the following is a specification.

My invention relates to an improvement in anchoring the ends of wire, where the wire is wound in the form of a close coil up to an abutment. It is particularly well adapted to use in connection with winding a wire jacket under great tension about a segmental core or body where the jacket is to be depended upon to resist the strain, where it is important that there should be no slacking of the tension at the point of anchorage, and a uniform smooth surface maintained, although it may be employed'to advantage in all cases where a neat and efficient anchorage is desirable and the conditions are such as to render it practicable.

My method consists broadly in forcing the end of the wire between the last preceding coil and an abutment.

In the accompanying drawings I have illustrated the application of my method to anchoring the ends of the layers of wire to abutments formed upon the gradually diverging inner faces of end bands or nuts surrounding the ends of a segmental tube.

Figure 1 represents the said tube in side elevation with one of the layers of wire approaching the abutment. the position of the end of the wire to be anchored at the point where it first begins to over ride the last preceding coil. Fig. 3 represents the end of the wire partially forced between the abutment and the next preceding coil showingthe sliver which is gradually shaved from its edge by the edge of the last coil, and, Fig. 4 represents the end completely anchored.

Arepresents the core or body around which the layer of wire is to be wound.

a a, &c.,represent the successive abutments up to which the wire is to be wound.

B represents the wire, I) the end of the anchor and b the sliver which is cut therefrom during the operation of anchoring.

Fig. 2 represents It is well understood that when wire is wound in a continuous coil around a core or body, the coils assume a spiral direction so that when the coils approach an abutment set at right angles to the axis of the core or body being wound, there will be left in advance of the point where the last coil engages the abutment, a gradually contracting wedge shaped space, too narrow to receive the full width of the wire. In the course ofwinding the wire, held under great tension, when the point has been reached where the last coil engages the abutment and the wire no longer seats itself by the side of the preceding coil, I find it expedient to force such over-riding portion of the wire, by means of a sharp blow or other suitable pressure, into the gradually contracted space between the abutment and the side of the last coil thereby wedging the end firmly between the said abutment and the coil and thus, without in any degree diminishing the tension upon the wire, I firmly anchor the end between the abutment and coil, by its frictional resistance.

In laying wire rectangular in cross section, as soon as the end to be anchored begins to over-ride the edge of the preceding coil, the forcing of the end into the gradually narrowing space will shear from the side of the end being anchored a sliver of gradually increasing width until the entire space between the last coil and the abutment is filled. Such shearing action is due to the fact that the preceding coil rests firmly upon the surface upon which it is wound so that its edge acts as a cutter to sever the overlapping portion of the end being anchored.

In actual practice I have found that a wire one-fourteenth (1-14) of an inch in diameter being wound under a tension of from six hundred to eight hundred pounds, may be securely anchored between an abutment and the next preceding coil by forcing its end for a shortdistance only between the abutment and coil and that the tension may be then slackened and the remainder of the gradually contracting space filled by further forcing the end between the abutment and the last coil, the gradually increasing width of the sliver finally severing the wire as the narrow slackening the tension and further forcing a portion of the space is filled.

What I claim is The method of anchoring the end of wire 5 wound up to an abutment, consisting in forcing the wire while held under tension into the gradually contracting space between the abutment and the preceding coil, and subsequently portion of the end of the wire into the con- 10 tracting space between the abutment and the I last coil, substantially as set forth.

JOHN H. BROWN. Witnesses:

NELSON CHANDLER, A. W. PORTER. 

